Add AI chat with Ollama tool calling for financial queries

Conversational AI chat that uses Ollama's native tool-calling API to query transactions, spending reports, account balances, dashboard summaries, and update transaction categories through natural language. Includes persistent conversation history, a full-page chat UI with sidebar, and rich inline rendering of tool results (tables, alerts, cards). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-02-09 23:34:16 -05:00
parent 1ceeca0fb6
commit 846edad2a4
20 changed files with 3237 additions and 0 deletions
@@ -0,0 +1,143 @@
+using System.Text.Json.Serialization;
+
+namespace Purrse.Core.DTOs;
+
+// API DTOs
+public record SendChatMessageRequest(Guid? ConversationId, string Message);
+
+public record SendChatMessageResponse(Guid ConversationId, ChatMessageResponse AssistantMessage);
+
+public record ChatMessageResponse(
+    Guid Id,
+    string Role,
+    string Content,
+    string? ToolResultType,
+    string? ToolResultJson,
+    DateTime CreatedAt
+);
+
+public record ChatConversationResponse(
+    Guid Id,
+    string? Title,
+    DateTime CreatedAt,
+    DateTime UpdatedAt
+);
+
+public record ChatConversationDetailResponse(
+    Guid Id,
+    string? Title,
+    List<ChatMessageResponse> Messages,
+    DateTime CreatedAt,
+    DateTime UpdatedAt
+);
+
+// Ollama tool-calling DTOs (separate from existing OllamaChatRequest to avoid breaking categorization)
+public class OllamaToolChatRequest
+{
+    [JsonPropertyName("model")]
+    public string Model { get; set; } = string.Empty;
+
+    [JsonPropertyName("messages")]
+    public List<OllamaToolMessage> Messages { get; set; } = new();
+
+    [JsonPropertyName("stream")]
+    public bool Stream { get; set; }
+
+    [JsonPropertyName("tools")]
+    public List<OllamaTool>? Tools { get; set; }
+}
+
+public class OllamaToolMessage
+{
+    [JsonPropertyName("role")]
+    public string Role { get; set; } = string.Empty;
+
+    [JsonPropertyName("content")]
+    public string Content { get; set; } = string.Empty;
+
+    [JsonPropertyName("tool_calls")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public List<OllamaToolCall>? ToolCalls { get; set; }
+}
+
+public class OllamaTool
+{
+    [JsonPropertyName("type")]
+    public string Type { get; set; } = "function";
+
+    [JsonPropertyName("function")]
+    public OllamaFunction Function { get; set; } = new();
+}
+
+public class OllamaFunction
+{
+    [JsonPropertyName("name")]
+    public string Name { get; set; } = string.Empty;
+
+    [JsonPropertyName("description")]
+    public string Description { get; set; } = string.Empty;
+
+    [JsonPropertyName("parameters")]
+    public OllamaFunctionParameters Parameters { get; set; } = new();
+}
+
+public class OllamaFunctionParameters
+{
+    [JsonPropertyName("type")]
+    public string Type { get; set; } = "object";
+
+    [JsonPropertyName("properties")]
+    public Dictionary<string, OllamaPropertySchema> Properties { get; set; } = new();
+
+    [JsonPropertyName("required")]
+    public List<string>? Required { get; set; }
+}
+
+public class OllamaPropertySchema
+{
+    [JsonPropertyName("type")]
+    public string Type { get; set; } = "string";
+
+    [JsonPropertyName("description")]
+    public string Description { get; set; } = string.Empty;
+
+    [JsonPropertyName("enum")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public List<string>? Enum { get; set; }
+}
+
+public class OllamaToolCall
+{
+    [JsonPropertyName("function")]
+    public OllamaToolCallFunction Function { get; set; } = new();
+}
+
+public class OllamaToolCallFunction
+{
+    [JsonPropertyName("name")]
+    public string Name { get; set; } = string.Empty;
+
+    [JsonPropertyName("arguments")]
+    public Dictionary<string, object> Arguments { get; set; } = new();
+}
+
+public class OllamaToolChatResponse
+{
+    [JsonPropertyName("message")]
+    public OllamaToolResponseMessage? Message { get; set; }
+
+    [JsonPropertyName("done")]
+    public bool Done { get; set; }
+}
+
+public class OllamaToolResponseMessage
+{
+    [JsonPropertyName("role")]
+    public string Role { get; set; } = string.Empty;
+
+    [JsonPropertyName("content")]
+    public string Content { get; set; } = string.Empty;
+
+    [JsonPropertyName("tool_calls")]
+    public List<OllamaToolCall>? ToolCalls { get; set; }
+}